90Gb

This reverts commit 8dac4823.

Let's try buildint again after hopefully fixing rubygems issue in
1f9adc65 (*: Pin rubygems library version when used; Do pinning by url)

/cc @klaus, @Tyagov

First of all, rubygemsrecipe tries to use latest rubygems library when
rubygems library version is not explicitly specified. So according to
slapos approach, that recipes are immutable, we should pin it.

For fluentd, Rafael already pinned rubygems library version to 2.4.8
(see b4fa5d31 "Pin fluentd version.").

However rubygemsrecipe tries to both find latest rubygems library
version, and to download rubygems when only version was specified from

    http://production.cf.rubygems.org/rubygems/

https://bitbucket.org/sirex/rubygemsrecipe/src/a37d4859a342b9250aeca8977ed565514a00fee4/rubygems.py?at=default#rubygems.py-126
https://bitbucket.org/sirex/rubygemsrecipe/src/a37d4859a342b9250aeca8977ed565514a00fee4/rubygems.py?at=default#rubygems.py-119

That site however no longer works and according to

    https://rubygems.org/pages/download

rubygems library tarballs are directly downloadable from

    https://rubygems.org/rubygems/...

So to make fluentd SR let's change pinning to work by full URL.

Also pin all other places which use rubygemsrecipe (only
software/unstable/gitrepo/software.cfg for now).

/trusted-by @rafael

  Drop fluentd as the instalation is not working well
  Stop rsync logs and use symlink
  Clean up installation
  Make network bench use parameters instead of a static test list.

Via installing Products.signalstack

    https://pypi.python.org/pypi/Products.signalstack

/reviewed-by @Tyagov

Conflicts:
	software/kvm/common.cfg
	software/wendelin/software.cfg

Redirect in nginx does not behave the same depending on wether it is
accessed directly or behind apache proxy.

- name wrapper bash, not sh as bash behave like sh when named sh
- add -l so that bash runs as login shell and reads .bash_profile
- enable colors in profile
- output a message in profile
- remaining TODOs: a working slapos node command